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A body is projected from ground obliquel...

A body is projected from ground obliquely. During downward motion, power delivered by gravity of it

A

Increases

B

Decreases

C

Remains constant

D

First decreases and then becomes constant

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The correct Answer is:
A
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AAKASH INSTITUTE-WORK, ENERGY AND POWER-Assignment (SECTION - A)
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  2. A particle moves with the velocity vecv=(5hati+2hatj-hatk)ms^(-1) unde...

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  3. A body is projected from ground obliquely. During downward motion, pow...

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  4. The blades of a windmill sweep out a circle of area A. If the wind flo...

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  5. A body of mass m, accelerates uniformly from rest to V(1) in time t(1)...

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  6. The power of a pump, which can pump 500 kg of water to height 100 m in...

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  7. A pump is used to pump a liquid of density rho continuously through a ...

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  8. A car of mass m has an engine which can deliver power P. The minimum t...

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  9. From a waterfall, water is falling down at the rate of 100kg / s on th...

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  10. On a particle placed at origin a variable force F=-ax(where a is a pos...

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  11. The variation of potential energy U of a system is shown in figure. Th...

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  12. The variation of potential energy U of a body moving along x - axis va...

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  13. A particle of mass 200 g is moving in a circle of radius 2 m. The part...

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  14. A particle of mass 200 g , is whirled into a vertical circle of radius...

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  15. A stone of mass 1kg is tied with a string and it is whirled in a verti...

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  16. An object of mass 80 kg moving with velocity 2ms^(-1) hit by collides ...

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  17. A ball of mass m moving with velocity v collides head-on which the sec...

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  18. Particle A makes a perfectly elastic collision with anther particle B ...

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  19. A shell of mass m moving with a velocity breakes up suddenly into two ...

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  20. A particle of mass m moving towards west with speed v collides with an...

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